Humidifier



FIG. 1 is a front, left, top perspective view of the humidifier;

FIG. 2 is a front, left, bottom perspective view of the humidifier of FIG. 1;

FIG. 3 is a top plan elevation view thereof;

FIG. 4 is a front elevation view thereof; and,

FIG. 5 is a rear elevation view thereof.

The broken line showing of parts of the drawings is included for the purpose of illustrating use and environment and forms no part of the claimed design. 

CLAIM The ornamental design for a humidifier, as shown and described. 